Reciprocating pump.



PATENTED JAN-13, 1903..

F. LAMPLOUGH. REGIPROGATING PUMP. APPLICATION FILED D110. 14, 1901.

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No. 718.132. 1 Y i PATBNTED JAN. 13, 1903. P'. LAMPLGUGH.

REGIPROGATING PUMP. A PPL1oAT1oN-r1LED Dnc. 14, 1901.

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UNITED STATES PATENT Ormes.

FREDERICK LAMPLOUGH, orWiLLEsDEN, LoNDoN, ENGLAND.

RECIPRopSATiNG PUM P.

SPECIFICATION forming part of Letters Batent No. 718,132, dated January13, 1903. Application inea December 14.19011." seria] No. 85,863; (Nomodem der them self-controlling in accordance with the variation ofpressure that occurs in a ves-` sel arranged in connection therewith.This y vessel may be a steam-generator, in which case the variation inthe steam-pressure could be utilized for the purpose of controllingthesupply of Water to the generator by the pump or for the purpose fcontrolling the supply of liquid fuel by the pump tothe burneremployedfor heatingthe generator, or the said vessel might serve` as a reservoirfor the fluid forced into it by the pump, so that when the pressure insuch reservoir reached a predetermined degreeit would control theworking of the pump accordingly. The pump may be of the bucket, plunger,or ram type and may be either single or double acting; but I prefer itto be of the plunger or ram type.

According to myinvention the pump-barrel is provided with a by-passcontrolled by a relief-valve which is adapted to be opened automaticallyby means of suitable devices which are under the influence of a flexiblediaphragm that is subject to the fluctuating pressure Within theaforesaid vessel. For this purpose the plunger or some other appropriatemoving part of the pump is connected,

. through the intervention of suitable mechanisrn, to one end of aleverhaving its fulcrum in a sliding piece which is adapted to be shiftedagainst the resistance of a spring by the pressure in the aforesaidvessel acting on said diaphragm. Adjacent to the other or free end ofthis lever is the relief-valve, which normally remains closed by theaction of a spring and lies out of the path of the free end of thelever.When, however, the slidf ing piece to which said lever is pivoted isshifted by the pressure in the aforesaid vessel rising, the fulcrum ofthe said lever is brought nearer to the said valve, `With the resultthat it is opened by the lever and permits the iiuid in the pump-barrelto be forced `delivery-valve. As the pressure in the aforesaid vesselfalls tothe predetermined degree the said spring reacts and returns thesliding piece with the lever to the normal position, with the resultthat 'the aforesaid valve closes again and the pump forces the fluidthrough the `delivery-valve.

1n order that my said invention may be clearly understood and readilycarried into effect, I will describe the same more fully With referenceto the accompanying drawings, in which- Figure 1 is a longitudinalsection, Fig. 2 a plan, and Fig. 3 an end view, of a feed-pumpconstructed in accordance with my invention and intended for supplyingwater to a steamgenerator. Fig. 4. is a transverse section on the line 11 of Fig. 1, and Fig. 5 is a transverse section on the line 2 2 ofFig. 1. Fig. 6 is a sectional elevation, and Fig." 7 an end elevation,showing a modification of the invention.

A is the pump-barrel; A', the suction-cham ber forming part thereof; B,the plunger or ram; C, the relief-valve; D, the valve-actuating lever;E, the sliding piece, and F its spring.

Referring more particularly to Figs. 1 to 5, the aforesaidpump-barrelAis furnished with a stufng-box d, through which the ram Bworks in its reciprocating movement. `The said ram is provided with aconnecting-rod b, hinged thereto at b', its freeend being connected tothe crank-shaft of any suitable form of motor or engine by means of theroller-bearing b2. Pivotally connectedwith the said rod l? is an arm b3,the free end of which :is coupled by a double link b4 to a rod d,adapted to slide in a stuffing-box A? on the suction-chamber A'. Thesaid arm?)3 is also, by means of a double link b5, connected at a pointb with a 'fixed bracketA8 on the pump-barrel A. During thereciprocations of the ram B the arm h3 oscillates about the point 197and imparts rectilinear reciprocating movement to the said rod d. Theinnerend of this rod is coupled to the valve-actuating lever D, which islocated in a vertical position Within the suction-chamber A and ispivotally connected at d to a rod d2, which Works IOO in a stuffing-boxA4 and is connected with the sliding piece E. This sliding piece is inthe form of a flanged head, upon one side of which bears the spring F,contained in a cap o r casing f. At the other side of said head is aflexible diaphragm f', which is acted upon by the pressure of the steamor other fluid passing to it through a passage f2. The spring-casingf iscontained within-an extension A5, with which the suction-chamber A isprovided. The said spring-casing is maintained in place by means of ahinged arm f3, extending transversely across and bearing against the endof said casing. This arm f3 is hinged to a screw f4, that passes througha lugf5 on saidv extension A5 and receives at its extremity ascrew-nutf. By turning this nut in one or other direction the positionof said hinged arm f3 can be adjusted sol as to approach toward orrecede from the casingf, and thereby cause the spring it contains to beplaced under more or less pressure, whereby said spring will exert moreor less resistance to the movement of the said sliding piece or headunder the influence of the steam or other pressure acting thereonthrough the diaphragm. The said relief-valve C is located near the lowerpart of the suction-chamber in the by-pass cx, leading from thepump-barrel to the suction-chamber, and is normally kept closed byaspring c, inclosed in a detachable plug c. The said valve hasguiding-wings c2 and is furnished with a prolongation c3, which liesopposite the free end dsof the said lever D. When the parts arein theposition represented in Fig. l, the fulcrum d of this lever D issituated too far away from the prolongation o3 of the relief valve toenable the free end of the saidlevertostrike thelatter,and consequentlythe Valve remains closed by its spring. If, however, the sliding pieceand its rod cl2 are shifted toward the left by the steam or otherpressure acting on the diaphragm f', then the fulcrum of the lever Dwill be brought nearer to the said prolongation of the relief-Valve,with the result that said valve will be opened by the free end of thelever and a portion of the liquid in the pu nip-barrel be allowed topass back into the suction-chamber during a portion of the inward strokeof the pu mp-ram. A diminished quantity of liquid will therefore bedelivered by the pump. The duration of time that the -said Valve Cremains open, and therefore the quantity ot' liquid delivered by thepump during the stroke of the ram, will depend upon the position of thefulcrum d', or, in other words, upon the degree of pressure acting uponthe diaphragm and the sliding piece. So long as the said reliefvalveremains closed the ram will draw liquid from the suction-chamber intothe pumpbarrel past the valve G and will discharge liquid from thepump-barrel past the valve H through the delivery-outlet h, Fig. 5. Theinlet to the pump is through the pipe I. The said suction-chamber A ispreferably provided with asecond pump-barrel A to receive a ram AXX,that can be actuated by hand through the intervention of a lever A6 whenthe apparatus is to be worked independently of the ram B, in which casethe liquid is forced from the suction-chamber A through the passage 71Xand past the delivery-valve H into the pipe h.

By this construction of feed-pump it will be possible to accuratelyregulate the amount of feed-water entering the steam-generator inproportion to the amount of steam withdrawn from the generator forworking the motor or engine, thereby insuring a perfect balance or ratiobetween the feed-water forced into the generator and the pressure ofsteam therein.

In the modified form of the apparatus illustrated by Figs. 6 and 7 thesaid sliding piece E, spring F, and diaphragm f' are located immediatelybelow the suction-chamber A', and the rod d2, to which thevalve-actuating lever D is fulcrumed, is coupled to the rod e of thesliding piece by means of a double link e', pivoted at e2. Thisarrangement permits of the apparatus occupying much less spacelengthwise than in the arrangement illustrated in the preceding figuresof the drawlngs. l

What I claim, and desire to secure by Letters Patent of the UnitedStates, is-

l. In a pump, the combination with the pump-barrel, a ram adapted toreciprocate therein with uniform strokes, and inlet and delivery valves;of a relief-valve, of a bypass from the pump-barrel controlled by saidrelief-valve, and of means for varying the period of lift of therelief-valve in relation to the stroke, and thereby gradually andautomatically diminishing the supply of water as a predeterminedpressure is reached.

IOO

2. In a pump, the combination with the pump-barrel, a ram adapted toreciprocate therein with uniform strokes, and inlet and delivery valves;of a relief-valve, of a bypass from the pump-barrel controlled by saidrelief-valve, of a flexible diaphragm subject on one side to thefluctuating pressure of a fluid, and of an oscillatory lever foractuating said relief-valve to a greater or less extent in accordancewith the extent to which the said diaphragm is shifted, substantially asand for the purpose specified.

3. In a pump, the combination with the pump-barrel, a ram adapted toreciprocate therein with uniform strokes, and inlet and delivery valves;of a relief-valve, of a bypass from the pump-barrel controlled by saidrelief-valve; of a flexible diaphragm subject on one side to thefluctuating pressure of a fluid, of a lever adapted to actuate saidrelief-valve, of a movable piece carrying the fulcrum of said lever andlocated on the opposite side of said diaphragm in a position to beactuated thereby, and of means for operating said lever fromthepump-ram, substantially as and for the purpose specified.

4:. In a pump, the combination with the pump-barrel, a ram adapted toreciprocate IIO therein with uniform strokes, and inlet and deliveryvalves; of a relief-valve, of a bypass from said pump-barrel controlledby said relief-valve, of a fiexible diaphragm subject on one side to thefluctuating pressure of a iuid, of a lever situated within thesuctionchamber of the pump and of a sliding piece carrying the fulcrumof said lever and located on the opposite side of said diaphragm to thaton which the pressure acts and in a position to be actuated by saiddiaphragm, of a prolongation on the relief-valve lying in the path ofthe free end of said lever, and of lever mechanism coupling theconnecting-rod of the pump-ram with said lever for rocking the latterabout its fulcrum, substantially as and for the purpose specified.

5. In a pump, the combination with the pump barrel, the uniformlyreciprocating ram, the inlet and delivery valves, the reliefvalve,theflexible diaphragm,the sliding piece and means for transmitting themovements of the sliding piece to the relief-valve; of a spring forresisting the movement of the sliding piece, of a casing inclosing saidspring, of a pivoted transverse arm adapted to bear against said casing,of a hinged screw on the free end of said pivoted transverse arm, of alug on the framing ofthe pump with which said screw engages, and of anut on said screw for adjusting the position of the pivoted transversearm relatively to the spring-casing substantially as and for the purposespecified.

6. In a pump, the combination with the pump barrel, the uniformlyreciprocating ram, the inlet and delivery valves, the diaphragm, thesliding piece and its spring, and the reliefvalve and the by-pass fromthe pump-barrel to the suction-chamber of the pump; of an oscillatorylever located in the said suction-chamber so thatits free end is capableof actuating said relief-valve, of a rod extending from said slidingpiece into said suction-chamber and receiving the fulcrnm of the lever,of a stufling-box on said suction-chamber through which said rod works,of a sliding rod connected with the upper end of said lever, of astuffing-box on said suction-chamber for the sliding rod to work in, ofa link connecting said sliding rod with an arm hinged to theconnecting-rod of the pump-ram, and of a link connecting said hinged armat a point intermediate of its ends to a lixed point on thepump-framing, substantially as and for the purpose specified.

In testimony whereof I have hereunto set my hand, in presence of twosubscribing witnesses, this 21st day of November, 1901.

FREDERICK LAMPLOUGII. Witnesses:

Tiros. PfWARDLE, WALTER J. SKERTEN.

